1. Exterior Angle Theorem Parallel Lines Cut by a Transversal
5.5
Exterior Angle Theorem
Parallel Lines Cut by a Transversal
Objectives:
To learn and apply the concepts of Exterior Angles and Parallel Lines Cut by a Transversal

2. Example 1
Find x.

3. Exterior Angle Theorem
The measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles.

4. Example 2
Find x.

5. Transversal
Transversal - A line intersecting two or more other lines in the plane

6. Interior Angles
Interior angles

7. Exterior Angles
Exterior angles

8. Corresponding Angles Corresponding angles
same location relative to intersection

9. Alternate Interior Angles

10. Alternate Exterior Angles

11. Consecutive Interior Angles

12. Example 3
Find angles 1, 2, and 3.

13. Example 4
Find the measure of each numbered angle in the figure.